Printing telegraphy



Jan. 26,1926. 1,570,923

L. M. POTTS PRINTING TELEGRAPHY Filed Dec. 29. 1922 '7 SheetsjSheet 1Hll W JM/fw 1 M POT-rs RINTING TELEGRAPHY Filed Dec1 29, 1922 IH bg v..sheetssheet 2 L M. PoTTs PRINTING TELEGRAPHY Jan. 26 1926.

Filed nec. 29, 1922 fr sheets-sheet s Jan. 26, 1.926.A 1,570,923

- L.. M. PoTTs PRINTING TELEGRAPHY /fy 05mm y Jan. 26 1926. 1,570,923 L.M. POTTS l PRINTING TELEGHAPHY Filed Dec. 29, 1922 7 sheets-Sheet s Mmmy;

l.L M. POT-rs PRINTING TELEGRAPHY Filed Dec. 29., 1922 '7 Sheets- Sheet6 ffy: /a 4, 4o

fan. 26511926.

L. M. POTTS PRINTING TELEGRAPHY Filed Dec. 29, 1922 7 Sheets-Sheet '7Patented Jan.. 26, i926.

Arent orifice,

LCJUL'S M. FTTS, UF .'l'rG'Hi'GD, NEW' JERSEY, ASG-NOR TO WESTERNELECTRC COM- PANE?, FNRPORATED, 0F NEW YORK, N. Y., A CRPORATEON 0F NEWYGRK.

PRNTNG TELEGRAFHY.

nppiication filed Becember 29, 1922. Serial No. 609,579.

telegraph receiving mechanism wherein the message is recorded in printedcharacters in page form.

its object is a printing telegraph receiving mechanism which is simple,reliable and eilicient in operation and one which is 1neniensivc tomanufacture.

llhe invent-ion disclosed in the accompanyingl drawings embodies aprinting,` telegraph receivingV printer commonly referred to as a pageprinter, comprising selecting mechanism, a stationary paper platen and atype wheel movable transversely of the printer and arrested in aprintingv position by the alignment of elements controlled by theselecting mechanism to form a rigid stop.

rlfhe invention in its preferred form pro vides a mechanical distributorfor translating,v the line c1 A ent ii'npulses into mechanical movementsto position suitable selecting mechanism in accordance with the linecurrent impul rilhe selecting` mechanism pre rably con of a series of'rotatable dists having apeitara'fs or openings therein, each opening'being.;` provided with a loosely fitting" spherical member or ball. riheopenings in the discs and balls ca ried thereby are so arranged that forany given arrangement or permutation of the rotatable dises a series ofballs, and only one series, will be brought into alignment to form arigid operating` connection or stop1 The positions of the selectingmechanism, that is, the discs7 are controlled by the mechanicaldistributor, which, in accordance with the preferred form of theinvention, comprises a plurality of revolvable and horizontally movablemembers, the rotation of which is controlled by a device having naturalperiod of molaeh of these members is arranged to tion. 'l1 occupy eitherof two positions :is by the energisation of a singleelectromagdetermined.

net, which responds to line current impulses. Secured to each of thesemembers is a cani which engages operating elements associated with thediscs for effecting the movement of the discs in accordance with theposition of the selecting members. Arranged to be arrested by theforming of the rigid connection or stop due to the alignment of theballs in the disc is a circular member which carries two balls and whichis mounted on the normally rotatingshaft. Also secured to this shaft androtatable therewith is a. type wheel, on the periphery of which are tworows of characters. When the balls in the rotatable member engage thoseof the discs the type wheel is positioned to bring the desired characterinto a printing position. Following the positioningl of the type wheel aprinting hammer operated mechanically is caused to move the paper intoengagement with the desired Vcharacter of the type wheel. The auxiliaryfunctions such as line feed, spacing, carriage return, shift and unshiftare in each case performed mechanically, as will be described more indetail hereinafter.

A better understanding of the type of apparatus which forms oneembodiment of this invention may be had from the following descriptionwhen taken in conjunction with the accompanying drawings wherein Fig. lis a plan view of the receiving printer with the cover removed; Fig. 2is a front elevation of the printer shown in Fig. i; Fig'. 3 is an endelevation of the same mechanism; Fig. l is an end elevation oppositeI tothat of Fig. 3; Fig. 5 is a sectional view showing a portion of themechanism; Fig. 6 is another sectional view talren along the broken line6-6 of Fig. l; Fig. 7 is a detailed view showing' portions of theoperating mechanism; F ig. 8 is a detailed View showing the manner ofconstruction of the printing` mechanism; Fig. 9 is a detailed viewshowing the manner in which the mechanism for the auxiliary functions isselected; Fig. l0 is a detailed view of the mechanism shown in Fig. 9;Fig. ll is a sectional view representingthe manner in which the typewheel is shifted to bring` the two'rows of characters into printing`position; Fig. l2 is a detailed view of the mech. anism shown in Fig.1l; Fig. 13 is a detailed Ulf) ' view of the distributing mechanism;Fig.

14 shows the single electromagnet with its armature, which according toits position deilects the selecting elements of the distributingmechanism to one side or the other of a stationary locking vane; Fig. 15is a detailed view of the mechanisms ofFigs. 13 and 14; Fig. 16 is adevelopment of the discs showing the arrangement of the balls carriedthereby; Fig. 17 is a study view showing the different positions assumedby the selecting elements of the distributing mechanism which arerotated through the action of a balance and escapement mechanism; Fig.18 is a detailed View showing the manner in which the discs carrying thespherical members or balls are held; Fig. 19 illustrates the elements ofFig. 18 in the other of their operative positions; Fig. 20 is a detailedview of the friction clutchwith its releasing mechanism; Fig. 21 showsthe manner in which the friction clutch elements of Fig. 20 arereleased; Fig. 22 shows the manner in which the shaft upon which theplaten is mounted is prevented from being rotated in a backwarddirection ,Fig 23 illustrates the manner in which the printing mechanismis prevented from moving the `paper into engagement with the type wheelwhen the auxiliary' functions are selected.

The mechanism herein disclosed is operated preferably by variouscombinations of five positive and nega-tive selecting impulses with anadditional impulse preceding each group of ,character selecting impulsesfor releasing thev distributing' mechanism for operation. y Thehimpulsesmay arrive .over a line from a distant station at which there is locatedsuitable transmitting mechanism and pass throughthe windings of a singleselecting magnet which responds to such line current impulses foreffecting the settin of suitable distributing mechanism. Thisdistributing mechanism being of a type suitable for translatingthe'effects Vof the line current impulsesinto mechanical movementscauses the positioning of selecting' mechanism to select the desiredcharacter as determined by the group of impulses transmitted over theline conductor. Instead of employing various combinations of positiveand-negative selecting impulses it is contemplated that the mechanismmay be operated by combinations of units of current and no current. Whenemployingunits of current and no current one of the windings of thesingle selecting magnet may be made inert and a retractile springprovided on the armature for restoring it to anormal position. It is tobe noted, however, that when the mechanism. is operated on a systemwherein the selecting impulses consists of positive and negative currentimpulses it is necessary that a relay be inserted between the line andthe single selecting magnet of the printer for controlling the operationof the two windings of the selecting magnet forming a part of theprinter.

In the accompanying drawings there is shown a stationary paper platen, arotatable and a horizontally movable type wheel and a printing mechanismwhich moves in unison with the type wheel. The type wheel and printingmechanism are each mounted on a helical screw shaft, while the former isrotatable yet horizontally movable with a shaft which has powercommunicated thereto through a friction clutch from a continuouslyrotating motor. The type wheel and the printing mechanism are adapted tobe moved from left to right transversely of the machine against thetension of springs one character space at each operation of the printingmechanism except when the auxiliary functions are heilig performed, atwhich time it is desired to prevent printing. Both the type wheel andprinting mechanism are adapted to be released and returned to theirinitial position by said spring for commencing a new line of characterprinting. For positioning the desired character into alignment with theprinting mechanism, suitable selecting n'iechanism, which is simple andreliable in operation, is provided.

The receiving printer illustrated in the drawings is shown incombination with the keyboard transmitter, which comprises a series ofkey levers 1, a plurality of permutation bars 2 and a single contact 3,which is operated in accordance with the positioning ofthe permutationbars 2 by the key levers 1. A keyboard transmitter of this character isdisclosed in the aat'ent to Harry Pfannenstiehl, No. 1,545,276, grantedJuly 7, 1925.

Referring to the drawings, and particularly to Figs. 1, 13, 14 and 17,it is seen that the distributing mechanism consists of fire selectingrods 7, 8, 9, 10 and 11, which are concentrieally arranged about aportion of the. circumference of the shaft 12. The shaft 12 is arrangedto be rotated by power conimunicated thereto from a motor under controlof a balance and escapcment mechanism through a friction clutch. rlhisbalance and escape-ment mechanism comprises escapement whe-els 13 and 14fixed on the shaft 12. an anchor 15, a balance wheel 16, a spiral spring17 and an impulse pin 18 which is fixed in the balance wheel 16. Thehelical spring 17 has one end fixed to the frame of the machine, whilethe other end is fastened to balance wheel 16. Pin 18 is positioned in amanner such that upon the rotation of the balance whe-el 16 by the powerstored in the helical spring 17, it engages a bifurcated portion of theanchor 15 for imparting to the escapement wheels 13 and letcorresponding movements. Accordingly, shaft 12 is caused to move step bystep. The movement Cit oit the shaft l2 through the action ot thebalance and escapement mechanism is so timed that the selectingelements7, 8, 9, l0 and ll Will he brought into operative relation With anarmature 25 ot' a selecting` magnet 26 upon the receipt ot the linecurrent impulses. rlhe armature of the selecting magnet 26 has its treeend beveled for the purpose of deleoting` vertically projecting portionsoit' the selecting; rods Z to l1, inclusive, to one side or the other ofa stationar;7 locking vane 24tin accordance with the energization. ot'the electromagrnct 2li.

The escapenient Wheels i3 and l-lf have three equal stops and a` fourthstop oit twice the length. As thehalance swings, shalt l2?. takes livesteps with equal time interv between their beginnings. it the end ot thesixth interval, however, the balance locks hut the shaft l2 continues tomore on account oit the long,` space after the third tooth. Each signalis made up ol a startingl impulse and live code impulses and a stop orseparating' impulse; seven in all.` The time interval ttor the start andstop impulsos made up ot the time oi the lonO' step, magnet operatingtime and the time for the balance to release the anchor. These factorsare so proportio ed with respect to the speed of the motor that thestart and stop intervals equal the code intervals and substantially aseven equal unit signal vis the result.

The 'feature iust described permits the operation ot sending,` andreceiving machin-es on the same circuit at the same speed since itautomatically compensates tor hoth plus and minus speed variations ineither nder or receiver. ln the usual stop distri itors Which move withuniform motion from starting to stopping positions some provision musthe mane 'to insure that the reA ceiv-er always tinishes its c vclebefore the sender. This may he done hy causingV the sender to alwaysstop 1hotiveen succeedinp,` signals or hv insuring that the receiver alAWays runs faster than the sender. ln the present device the balancelocks betere the escapement Wheels and is ready to start at the correcttime for the neat signal even though the escap'ement Wheel has not yetcome to rest. The tirst stop interval ot the escaneture 25 ot theelectromagnet 2 mal position, a member 2l" is posit" that a stop arm 28is move-5,. end is in the path or a notch fo halance Wheel iti. lt isthus seen the armature E55 is in its normal the balance Wheel l@ isprevented i tilting due to the engagement a notch therein With stop rm4llovvever, upon the receipt of tl e starting` impulse, the re strainton the member 2? is relieved and stop arm 28 through the action oi arotraetne spring` is moved out of the path of e notch in the halanceWheel lil, and accordir' the balance wheel iti is free to rotate um...the action or' the spiral spring` l?.

Secr-"ed to each ot the selectin to ll, inclusive, rotatable andinovahle there-.'ith is an op 'ina' cani which serves to translate theenects et the line current impulses into meel anical i ments. rlhe-secams have heen des hv the numere j, 30, 3l, 32 and apparent from llinclusive.

rods i' aontalb1 e' e ur. li, the selecting: rods r simultaneously. otthe setting' oi the selecting' mechanism controlled by these camssimultaneously rather than sequentialh7 as the selecting rods arepositioned..

he selecting mechanism, shoivn in l, 2 and lo, consists o1 live discs4:0, l all, each heir vided with cs to he lli-ought into alignment 'torforming a rigid (uneratinu connection. in order to permit 'tue easvmovement or the discs with their associated halls. and also to permitAhe halls to more quickly hre dor/n the conncction,` plates 46 and l? aalso provided With spherical ineinhers or halls coincidim with those inthe e selectin; plat which are arranged on iosite sides et the plates.lt is to he noted.` however, that these plates and 1li' are stationary.

Arranged in operative re are five pull hars 50, 5l, oi these pull harshas e .e c While the other end has a ectinn portion on the nideiYsurface ot end. This ctinp; portion is adapted to he fitted in a notchcut in the discs so "hat upon the inoven'ient o' the pull bar thecorresponding o the discs Each oiturcated,

disc will be moved to one or the other of its operating positions. Asshown in Figs. 18 and 19, the pull bar 50 has pivoteo thereto twooperating members 56 and 57, the latter having' a portion surrounding'an arn. of the former whereby for certain positions of the latter theformer will be moved in accordance with such position. rlhe member 56 isprovide with hooked portion and a straight portion, each of which isadapted to be moved upon the positioning; thereof by a universal member5S. This universal member is rotatably mounted on a rod and extendsacross a portion of the back oit' the machine. The universal member 5Shas a projecting' portion fitted in the bifurcated end of a pivotedanchor 60. This anchor 60 is moved upon the engagement of a cam 63mounted on a shaft 6a with the proj ectinggj portions thereof. The cam29, 30, Si, 32 and 33 are positioned just helow the members and 57 sothat upon the selection of these cams through the positioning' of therods i to 11, inclusive, and upon their continued rotation the members56 and 5T will be moved to cause the positioning of the member 56 sothat the pull bar associated therewith will be moved, and consequentlythis 'disc associated therewith will also be moved. lt is to beunderstood, of course, that the movement of the pull bars by themovement of the universal inember 5S is brought about at a time justfollowingI the positioning of the members 56 and 57 by the cams 29 to33, inclusive.

As previously stated, the characters are formed in two rows on aVtypewheel 7G which is rotatably mounted yet horizontally movable on ashaft 71. Secured to this shaft is a plate TF2, which. shown in Fig. 6,has two apertures in which there are loosely fitted spherical members orballs 73 and 74. As will be described more in detail hereinafter. theshaft 7l has power communieated thereto from a continuously rotatinn:motor through friction clutch. Accordingly, the shaft il normally tendsto rotate, the release of which is brought about followingv thepositioning; of the selecting' elements '.7 to 11. Assume now for thesake of clearness that the shaft 'il is rotating and that the discs fr0to eli, inclusive, have been positioned Such that a series of balls 45are aligned to form a rigid operating' connection. Thus, upon thecontinued rotation of the shaft 7l and the plate 72 one or the other ofthe balls 73 and 74 will engage the aligned balls. rllhe engagement ofeither of the balls 73 and Tel with the aligned balls causes the shaft7l. and consequently the type wheel 70, to be stopped. The type wheel7() will be stopped in a position such that the desired character is inalignment with the printing' mechanism.

The printing mechanism comprises a `ed to rotate with the gear wheel S6.

printing hammer 75 which is operated mcchanically through a series oflinlis or levers for moving' the paper T7 into en- Distribution power.

pai-".iilai'ly to i, 9 3 and Ll. own a motor Sti which has its drivingshaft coupled with a shaft upon w iirh is secured a driving gear i112 bvmeans of a tieible coupling,l 8l. d The. drivino oear "0 drives annitermediate gear S3,

t3 "1 ou which has associated there vith a reduction gear 'lfhe teeth ofthe reduction gear l mesh with those ot' gear wheel Elo secured at oneend of shaft 6i. rlhe shaft extends cross the baci; of the nnxchiue andhas secured on its end opposite to the one carrying,` the .crear wheelS5, a rear wheelA 86, which has associated therewith a friction clutch.This latter feature elearlv shown in Fig'. Q0. The teeth of the tearwheel S6 mesh with those of an idler iiear 8T mounted loosely on shaft8S. The shaft S8, like shaft 6ft, extends across the niacghine andserves as a support for the platen about which tie paper 77 The, teethof the idler zgear ST mesh with the teeth of a second idler gear 89mounted on a rod il() which also serves as a means for seeurinii thestationary plates i6 and 4.7 in position. rlhe idlergear 89 drives aeear 9i, which is secured to the shaft 7l, which like the shaft 64- isdriven through a suitable friction clutch as is more cleaurlv shown inthe lower left hand iioition of the unearntus of Fig. i. A l i i rilheconstruction of the friction clutch is as follows: mounted ou the sideof the .scar wheel 86 is a series of posts 92 ou which are mounted apliunlitiof plates tl udaptlliidly secured to a sleeve 6o whichsurrounds a portion of shaft 6l and which has Secured thereto theoperating; cams, is a pluralitv of plates which are of lesser diameterthan the plates 93. intermediate the plate-s which are rigidly securez;to the oear ivheel 86 and the plates (Jil, which are rigidly secured tothe sleeve 65 is a series of friction discs which may consist of wood orany7 desirable material. Mounted on a sleeve surrounding' the powershaft and directly coupled with the friction clutch inst described is astop member 96, which is normally engaged by a projeeting portion of apivoted menfer 9T. i/ccorilingrl'v, the pivoted member El? prevents thev`rtop inember 96, together with the elements of the friction clutch,troni rotating. There is also associated with the pivoted member 97 acam 98, the cani 96 being rigidly secured to the shalt 19 about whichthe seiccting elements 7 to 11, inclusive, are arranged and which rotatewith this shaft. rihe cam 98 has its depressed portion arranged suchthat the pivoted member 97 under `the action ot' a retractile springwill be caused to move inwardly, thereby moving an end ot the pivotedlever out oit the path ot the stop member 96. The stop member 96 withits associated mechanism is thereupon tree to rotate by powercommunicated thereto from the friction chitch. it is apparent trom thepreceding description t iat power is communicated from the continuouslyoperating motor 89 through suitable gearing t-o a triction clutch andthen through other gears to the shaft upon which the type wheel 70 ismounted.

A better understanding of the invention may be had from a description ota particular character seiection and the various operations incidentthereto.

Let it be assumed that the sending apparat'us at a distant station istransmitting fa series of impulses for selecting the character D, andlet it be further assumed that the cha 'acier D is selected by liveunits combined in the following order positive, negative, negative,positive and negative; or it if; be assumed also that the five selectingunits are represented by current, no current, no it is,

current, current and no current.

of reune. to be understood that since the mechanism herein described isot the startstop typo, it in r-ecessary that the selecting ,ceded by acurrent impulse tor rots le p ot the distributing i be assumed that forf sidaction chosen for illustraleft hund winding ot the elecw,considered from the back of energized upon the receipt or a positivennpulse while tor a negative .impulse the right hand winding isenergized. The transmission ot a starting impulse euses the energizationof the electromagnet 26 ior releasing the support of the member 27 andthus permitting stop arm 28 to re lease under spring tension. Thebalance wheel 16 is now free to rotate by the action of thespiral'spring 17. The 'escapement Wheels 13 and 14 will for eachoscillation of 'the balance wheel 16 through the action of the pin 18 becaused to advance one step at a time. The shaft 12, which is driventhrough a friction clutchy under control `of the balance wheel throughthe anchor and escapement wheels, has imparted thereto a correspondingmovement. As shown in Fig. 17, for leach{oscillation of the balancewheel the escapement wheels will be moved to assume a differentposition, which in turn causes the rotation of the selecting elements 7to 11 in a step by step fashion. As the selecting elements 7 to 11 arerotated in this manner and upon their engagement with the armature 25 ofthe electromagnet 26, they will be deflected to one side or the other ofthe stationary vane 24 in .accordance with the character of the linecurrent impulse or the selecting unit. For the particular selectionchosen the vertical projecting portions on the selecting elements 7 and10 will be deflected to the lett of the stationary vane 24 upon beingbrought into engagement with the armature of the electromagnet 26, whilefor the other selecting units the vertical projecting portions of theselecting elements 8, 9 and 11 will be deflect-ed to the right of thestationary vane upon their continued rotation. The positioning of theselecting elements in this manner causes the corresponding lpositioningof the cams 29 to 33.

Following the positioning ot selecting element 11, the depressed portionot cam 98 is brought into alignment with the upper portion of thepivoted lever 97 which is now moved under the action of a retractilespring to a position such that 'the stop member 96 is free to rotate.Power is now communicated to the .sleeve 65 through the trietion clutchand the connecting gear from the motor 80. Consequently, a continuousmotion is imparted to the sleeve 65, upon which there is mounted a'number of cams 'for performing the necessary mechanical opera tions. l

The positioning of the cams 29 to 33 by the movement of the selectingelements 7 to 11 to the positions just described causes, upon thecontinued rotation of these cams, the operation of the elements 56 and57 which are secured to each of the pull bars to 54, inclusive. For theparticular selection chosen the cams 29 to 33, inclusive, act on thepivoted elements 57 of the pull bars 50 and 58, respectively, Whilethe'other ot the cams act on the pivoted element 56 ot the pull bars 51,52 and 54, respectively. AS the sleeve continues its rotation, cam 63 1sbrought into operative relation with the operating elements of thepivoted anchor 66, whereupon the universal member 85 is rotatedorfmoving' the pull bars 50 to 54, inclusive, in accordance with thepositioning ot' the cams 29 to 33, inclusive. The movement of the pullbars 50 to 54, inclusive, causes the rotation of the discs 40 to 44 toa. position such that one series, and only one series ot the sphericalmembers or balls carried thereby are aligned to `iorm a rigid operatingconnection. For the purpose ot illustration it may be assumed that thediscs are moved to a position such that the balls are aligned in themanner shown in Fig. 16.

.as previously stated, the shaft 71. upon any of the balls in theselecting discs 40 to 44, inclusive. The type wheel` with itsassociatedshaft thus'continues its rotation until'the ball 73 carriedbythe plate 72 en- 'gages'the aligned balls, at which time the typewheel 'is arrested for bringing the character D into alignment with theprinting mechanism. It isto be noted here that the shaft 71, aspreviously stated, is drive-n from the gear wheel97 through a frictionvclutch and isfthuscapable: of being arrested without causing the`stoppage` ofthe other gears.

Just followingv the positioning lof the character D in alignment withthe printing mechanism, cam 110, vwhich is mounted on the sleeve 65, hasits depressed portieri brought into alignment with the bell crank 'lever111. The bell crank lever 111 is rotatably mounted on a shaft 112 andthrough links 114 and 115 a movement corresponding to that of bell cranklever Y111 is imparted to shaft 116. As shown in- Figs. 4

and' 7 ,i the shaft 116 has secured thereto a n bell cranklever 116lwhich serves to move the free'end of a pivoted member 117 intoengagement with teeth: in a toothed wheel or gear 118. The gear 118'issecured on one side of the type wheel 70, the number of teethcorresponding tothe number of charaeters on the type wheel. Theengagement of the free end of theV pivoted member 117 with the teeth inthe gear wheel 118 causes thetvpe wheel to be positioned such that thecharacter D is correctly aligned with the printing Vmechanism. r1`herestoration of the pivoted member 117 to the position shown in Fig. 4 isbrought about when the raised portion on the cam 110'engag'es the freeend of the bell crank lever 111.

Referring'now to Fig. 8, there is shown a cam 76 secured to sleeve 65,which is now being rotated by power 'from the motor 80.

The4 cam 76is arranged on the sleeve 65 in such a manner that itsdepressed portion is brought into alignment with a pivoted leverfollowing the` positioning of theA type wheel to bring thedesired.characterv into a .printing position. The pivoted lever 100 actson a connectinglever 101, whichhas its other'end connected with a'lever102 secured to shaft 103. As the pivoted lever 101 is moved downwardlyundertheaction of a retractile spring shaft 103 is caused to rotatethrough the linkage arrangement just d'escribed for producing Varotative motion to an element 1704, thefbifurcated'end of which moves aprinting hammer 7 'through the instrumentality of a pin 105 to move thepaper 77 into engagement with the aligned tyigic. Consequently, thecharacter D will be printed on the paper 77.

Spacing.

Spacing between characters is effected by the power shaft, and in theembodiment disclosed the type wheel and the print mechanism are movedforward one step or one character space against the tension of a spring119 immediately after each character is printed. Rotatably mounted onshaft 88 is a ratchet wheel 120, the teeth of which are adapted to beengaged by an operating paw] 121 and a holding pawl 122. The operatingpawl 121 is secured on one side of a rotat able member 123, the movementof which is produced upon the rotation of a lilik 124, which has itsfree end fitted in the bifurcated end of the member 123. As shown inFig. 5, the link 124 is rigidly secured to the shaft 103. As previouslystated, shaft 108 is rotated when the depressed portion of cam 76 isbrought into alignment with the free end of member 100Y whereupon theprinting hammer 75 is moved through a series of links to effect theprinting of the desired character. At the same time, the link 124 isrotated for causing the stepping pawl 121 to be moved to the right forengaging the next succeeding tooth. lhen the member 100 again engagesthe raised portion of cam 76, shaft 103 is rotated to the position shownin Fig. 8. at which time link 124 is moved to the position shown in Fig.5, and accordingly ratchet wheel is advanced a distance equal to thespace of one tooth.

'In order that the movement of the ratchet wheel 120 will be imparted tothe shafts upon which the carriages supporting the type wheel and theprinting mechanism are located, the gear wheel 125 is secured to theratchet wheel 120. The teeth of the gear wheel 125 engage those of adriving pinion 126, which has its teeth meshcd with those of gear wheels127 and 128. These latter gear wheels are secured to one end of spiralscrew shafts 129 and .130, respectively, upon which the type wheel andprinting mecha-- nism carriages -are mounted. Thus, for cach movementofthe ratchet wheel 120, a corre spending movement is imparted to theshafts 129 and 130 for moving the respective carriages a distancedetermined by the advancement of the operating pawl 121. As shown inFigs. 1 and 2, shafts 129 and 130 are each provided with spiral screwportions, on the inner surfaces of which there is arranged a pair ofrollers to which is secured the respective carriages. The provision ofthese rollers permits the movement of the carriages withoutJ appreciablefriction. Although the preceding description llO elieeted in tl einendistnnoe thifonglfi i ed to space between which nting han; ei' isallowed to i' eifel i i'edneed to si point suoli that the peper ie notthe type Wheel. @ewige11Uentily the niinting ot cheinoten; when suolii'nnetion is desned, is pie- Yvented.

l iwi/limi: @oem/nem.

Si el o e t i o; :i n d ln addition to rione elnirnirtem isn-i;heinf'een einheiioie desi i lim'y ineol nnionl. oi

Snell for o', el carriage re- Vie "t oid nnehitt, that Shifting iioinnnnei to lower ceso and i'iee o the lett` lnind eide of 15g. l. i. sho*an ilni-QlitjiY ot Sii-ciel null heirs 181, 132, Y and li 5 "which fuehoiiZonfmllj/Y novehie und each of which hns seonied thereto nif'eitionllfif' exteiding lii'ik sneh ne if. Ae Shown in TLG, each otthese niv otod linlle lino i yoition in nligygnniont with in oieintinpin 13T. Raon. of these pins, i' ei'e heine; fe in. nnnihei."eottesnondinag` to eli. ot the `onli lh 1323 133 and .i359 ie indiifidnai and piintiiig providing ineeos fon fnetoi'if; sind wonde, ne

there ae Veiions ieizitione to he enne to n. ies ot nniliaify i i siteenged in the diese l-O to lilon the no ot n n'l i,h is Sligj itly 'i 'hecircles noon nte minnged.

,e7 the diameter o ,zjiezitei than the die hieh the sei" .iofitionedinet Wow the nuifiriliniv e i halls me immonsv ehniied no 'which the'ifee ends` oit the links eige :winged to he n; 'oi inovingi' the i.hein in z=.ceoifnnee with their eeleodeterminen hy the alignment of? thein in n Y 3 end in f in erich ot tl'ie edges oi, th, lniie een: Y thenotehe, t din? in in the si i e oi the other oi' wndin" nnen. nf'hetheifthe oi' no`r Pl, ivoiiion 'for the ti n in with whiirh that notch isoeizited. iii/hen the dieee ne all in the pos ion toi.' function, thelevers ere tiee to inove into the notches. any one o1" the .live

e the1 position, the czun to noi'i'nel. n' will. i eeen ti it levei i235is inoved with .hstzintinlly :i positive nfotion in both diz" Shiite.rElie n'inveienl n iii,

n) l@ nn selectively conti ll d by linie @infront iiniinlses inenhstzintie ly the sii-.nie nimmer is il t described in. connection withti noel tioning oi the tjfiv wheel, that rions auxiliary mechanicaltnnetions este Seleoti'veijif controlled hy both positive and vgi'ntiveinnfnlees which :we tn.

neend by; the se.'

e Seine n e various eheifaetei selections. toi.' iieitoiining theee'nnotions is plied 'i'oni the inotoi 80, iimioh motion to sleevethi'ongh e i e clutch, n mit ot which in inonnted on @hatt rf thepurpose ot rotating the i? et and sfoaee between liv-im` i. CY,vii-teteie3 n link 143 ext g; 1 :i hell omni; leveil lil- L end the pnll132 is pioi/ided The hell omni; leve opposite i ix'nneeted. mioperating;

iillien the 'are aligned to Y tin oetzon, nin 13? eoieenoi ,i i

1' D ontod Jieiioi'e into niecininieni. hill l o, n.' haelt lash in thenioifeii. t oi the il 'upon whivli. the @laten is mounted, e intohetwheel 147 is eeonied on the extreme right linl eide ot this shaft. Thisratchet Wheel M7 is a1- 'nnged to foe engaged h5* n projection oailiiedCII the type Wheel ZO is mounted a sector 150.

The sector 150 is arranged With respect to the type carried by the typeWheel such that when any one of the auxiliary pull bars 131 to 135,inclusive, is selected it will be in a position such that the printinghammer 7 5 and the spacing mechanism are prevented from operating. Asshown in Figs. 3 and Q3, forming' a part ot the operating lever is anextending lever 151 which is arranged to engage the surface ot thesector 150 when the type Wheel is positioned such that the sector 15G isin alignment with the projecting portion of the extending menr ber 151.The printing hammer and the spacing mechanism are prevented from goingto their :fullest extent, thereby preventing' them from performing theirallotted functions. The sector 150, however, is provided with adepressed portion which permits the spacing pavvl to be moved to aposition such that it engages the next succeeding tooth but'whichprevents the printing` hammer 7 5 from causing the engagement ot thepaper 77 With the type carried by the type vvheel. This particularposition is shown in full lines in Fig'. 23, While the dotted linesindicate a position ot this lever tor the other auxiliary selections. Itis apparent from the previous description that for each or' theauxiliary function the printing mechanism and the spacingmechanism areprevented from operating, While in the case ot spacing between lettersand Words the spacing mechanism is permitted to operate While theprinting mechanism is prevented from causing the engagement of the paperWith the type ot the type vfhcel.

Shift.

As previously stated, the type wheel 'T0 is provided with tnvo rows otcharacters, one oit which carries the letters ivhile tae other carriesfigures, punctuation narlrs and other special characters. Normally, thescren7 sh artt 130, the rotation ot' vfhich translates to the type Wheelby a step by step motion, is normally unserv spring` tension ol a spring153 vvhich is secured between a supporting member 1511 and a thrustbearing 155, the latterbeing in engagement with a surface ot the gearWheel 123 carried by the shaft 130. Also secured. to the shaft is acollar 15G,

which has arranged therewith a thrust bearing 15?. its shown in Figs. 11and 12, there is provided a pivoted member 153 which is normally underspring' tension and which holds the shaft 130 against the tension ot thespring 153 in its unshifted position. y

Then it is desired to shil't the type wheel, that is, bring the roW ofligures, punctuation marks and other special characters in alignmentWith the printing mechanism, it is necessary that the selecting rods 7to 11 be positioned in accordance with the predetermined codecombination of impulses allotted to this particular function. Thepositioningr ol the selecting elements 7 to 11, inclusive, producesthrough the cams 29 and 33 movement oi the discs 11() to i-l, inclusive,such that the auxiliary series ol balls 138 or 139, as the case may be,canse the pin 13T individual to the pull bar to be selected. 'Eheselection of this pin moves the pull bar 135 to a position such that itsnotched portion is in alignment with the universal mem; her 1Ll0. Thus,upon the movement of the universal member 140 by the action ot theeccentric 1111 on the operating arm 1li-2, the pull bar is moved to aposition such that operating member 150, Fig. 12, is moved to cause acorresponding movement ot the connecting link 159 Which is iixed to theoperating member 1GO and the pivoted member 158. Then the pull bar ismoved in this manner the pivoted member 158 under the action of itsretractile spring is moved to a position such that the member 153 ismoved away from the co'llar 15G, whereupon thc shaft 130 and the'typcwheel TO are allowed to move to the lett. lith the typo wheel in itspresent position, numerals, punctuation marks and other specialcharacters may now be printed through the operation of the distributingand selecting mechanisms in a manner similar to that previouslydescribed in connection with the selection and printing of the characterD.

lhen the type Wheel is in a. position tor printing numerals, punctuationmarks and other special characters and it is desired to unshitt the typeWheel from upper case (o lower case, it is necessar)Y that a specialgroup of impulses be transmitted in a inanner similar to that describedin connection vith the transmission ot the innimlses designating` the.character D for operating the distributing and selecting mechanisms tocausethe alignment ot one ot thc series ot auxiliary balls carried inthe discs 1-0 to 111-, inclusive. The alignment of thc balls to lorm arigid operating connection selects the pin 13?v individua to the pullbar 131 for causing this pull bar to be moved to a position Where thenotch thereof will be engaged by the universal bar 14:0 upon the EDSoperation of the eccentric 141. When the pull bar 134; is moved,operating member 162 is likewise moved tor causing the movement ot'. aY-shaped portion 161, ot member 162, which has its arms, as shown inFig. 11, on the upper and end side ot the shaft 130 and in operativerelation with the collar 160. The movement of the Y-shaped member 161causes the movement ot the shaft 130 to the right to a position wherethe pivoted member 158 again engages a surface of the collar 156 torholding the shaft 130 together with the type wheel .in a position suchthat the letters of the alphabet are in a printing position.

Carrz'agc re turn.

Mention has already been made of the manner in which the type wheel andprinting mechanism is moved from lett to right step by step for lineprinting. When a tull line has been printed or when it is desired toreturn the two carriages to the left to commence a new line, a group ofselecting impulses is transmitted over the line to cause the operationof the distributing and translating mechanisms to select one of theauxiliary pull bars through the action of one ot the pins 137. In thisparticular case the pull bar 133 will be moved upon the movement of theuniversal member 140. Attached to the pull bar 133 at its free endopposite to that near which the notch thereof is cut, is a rotatablemember 163. This rotatable member163 has a portion thereof formed in the`arc of a circle and in its periphery there are cut two notches ofdifferent depths. When the rotatable member 163 is moved by the actionof the pull bar 133.

the operating `pawl 121 andthe holding pawl 122, which, as previouslydescribed, engage the `ratchet wheel 120 for causing the movement ot thetype wheel from left to right to provide spacing between words,

are caused to disengage the teeth of the ratchet wheel 120. With thepavvls 121and 122 out of engagement with the ratchet wheel 120, theshafts 129 and 130, upon which the type wheel carriage and the printingmechanism carriage are mounted.v will be caused to rotate under theaction of a spring 119 in a direction such that the respective carriageswill be returned to the extreme left hand position for the `commencementof a new line of printing. In order that the holding pawl 122 will notengage the teeth of the ratchet wheel .120 until the type Wheel andprinting mechanism carriages are returned to their normal startingposition, a

holding pawl 164 engages the shallower notch in the periphery of therotatable member, thus preventing' the restoration of the rotatablemember 163 to its normal position Ifuntil after the ratchet wheel 120has been advanced upon the printing 0f the first character after therespective carriages have been returned to their normal startingposition.

Although the invention has been shown and described as applied to aparticular type oi' printing telegraph receiving printer, it is obviousthat variations may be made without departing from the spirit and Scopeof the present invention.

What is claimed is:

1. In a type wheel arresting mechanism, a plurality ot movable members,means for setting said members in predetermined combinations, and meansloosely supportedV by said members and effective upon the movementthereof to Jform a rigid stop at various positions for said type wheel.

2. In a type wheel arresting mechanism, a plurality ot independentlymovable elements selectively operated, means for setting said elementsin predetermined combinations, and a plurality of elemental stop membersloosely carried by each ot said elements and aligned by the setting otsaid elements to form a rigid stop for said type wheel.

3. In a receiving telegraph printer. a shaft, a type wheel mounted onsaid shaftj means tor arresting said type wheel shaft in any one of aplurality of positions comprising` a plurality ci' independently movableplates each provided with a. plurality of transverse openings, elementalstop members carried in said openings, and means controlled by linecurrent impulses for selectively moving said plates to bring a desiredseries of elemental stop member into alignmentto form a rigid stopwhereby said type wheel is arrested in the desired printing position.

4C. In combination, a plurality of revolvable and horizontally movableselecting members arranged to occupy either of two positions, meanshaving a natural period ot motion for controlling the rotation of saidmembers. a locking vane tor retaining said members in their actuatedposition. and an electromagnet having an armature with a beveledextension for causing' said selecting members upon their rotation bvsaid rotating means to be deiiected to one side or thev other of saidlockingP vane dependingir on the energization of said electromagnet.

5. In a i printing telegraph receiving printer operative on thestart-stop principle. a pluralitv of revolvable. and horizontallymovable selecting elements` means having a natural period of motion torcontrolling the rotation of` said selecting elements. andmeansresponsive to a starting impulse for directly releasingr saidrotation controlling means and responsive to character selectingimpulses for determining the position taken by said selecting elementsupon their rotation.

6. In a printing telegraph receiver, a p lurality of .selecting elementscapable of being liti revolved through a complete circular path arrangedto occupy either of two positions, means responsive to line currentimpulses for determining the position taken by said selecting elements,and means for rotating said elements step by step in timed relation withsaid line current impulses for permitting the positioning of saidelements in Aaccordance with such line current impulses.

7.. In a printing telegraph receiver, a plurality of selecting elementscapable of being revolved through a complete circular path arranged tooccupy either of two operativepositions, means responsive to linecurrent impulses for causingA the positioning of said selecting elementsinto one or the other of their `operative positions, a balance andescapement mechanism operative in time relation with the line currentimpulses for controlling the movement of said elements step by step tocause the setting thereof sequentially iny accordance with the actuationof said first recited means. Y

8. In a printing telegraph receiver, a series of type, combinationselecting mechanism, printing mechanism, auxiliary function mechanism,two power driven clutches means controlled by one of said clutches tomove a selected type to printing` position, and means controlled by thesecondk clutch to operate in a single continuous revolution theselecting mechanism, the printing mechanism and theV auxiliary functionmechamsm.

9. In a printing telegraph receiver, charaeter type, character selectingmechanism, means to set the character selecting mechanism accordingtothe character to be selected, means comprising a single poweroperatedA clutch to move thel selected character type to printingposition, and means comprising a second clutch operated once for eachrecording operation to set the character selecting mechanism and to4operate the printing mechanism.

10. In a printing telegraph receiver, selecting mechanism comprising aplurality ot selectable elements, a single selecting magnet responsive.to line current impulses for positioning said elements into one ot twooperative positions, translating mechamsm positioned in accordance withthe operation of said selecting elements, character carrying mea-ns,means controlled by said translating mechanism for causing thepositiening of said character carrying means in accordance with thesetting of said select'- ing elements, and means responsive following`the positioning of said character carrying means for causing a slightangular movement thereof to bring the desired character into accuratealignment with a printing mechanism.

11. In a printing telegraph receiver, a plurality of rvolvable andhorizontally movable selecting elements, means for positioning saidselecting elements in accordance with line current impulses, translatingmechanism controlled by said selecting elements comprising a pluralityof members having a plurality of apertures, spherical members positionedin each of said apertures, a type wheel normally tending to rotate, andmeans for arresting the rotation ot said type wheel upon the alignmentoi the spherical members carried by said plates in accordance. with theoperation of said selecting mechanism to bring the desired characterinto` a printing position.

12. In a printing telegraph receiver, a plurality of revolvable andhorizontally movable selecting elements, means for positioning' saidselecting elements in accordance with line current impulses, translatingmechanism controlled by said selecting elements comprising a pluralityof members having a plurality ot apertures, spherical members positionedin each of said apertures, a type wheel normally tending to rotate,means for arresting the rotation ot said type Wheel upon the alignmentof the spherical members carried by said plates in accordance with theoperation of said selecting mechanism to bring the desired characterinto a printing position, and means operated following the positioningof the type wheel for effecting the printing of the desired character.

13. In a printing telegraph receiver, a plurality of eircumferentiallyarranged selecting` elements arranged to be positioned sequentially inaccordance with line eurrent impulses, translating mechanism operatedsimultaneously due to the movementot said selecting elements. a typewheel normally tending to rotate, and means controlled by the setting otsaid translating mechanism for arresting the rotation of said type wheelto bring the desired character iu-v to printing position.

14. In a printing telegraph receiver. a plurality of selecting elementsarranged to occupy either of two operative positions, means tor rotatingsaid elements. means responsive to line current impulses for settingsaid elements upon their rotation sequentially. a plurality of operatingelen'lents normallv tending to rotate. and means onerated following thesetting of said selecting elements for releasing said operating elementsfor rotation, said operating elements` being arranged to control theprinting :ind necessary auxiliary functions.

15. In a printing telegraph receiver, a plurality of revolvable andhorizontallv movable selecting elements arranged to octio cupy either oftwo positions. a single seleetoperated following the setting of theselecting elements foi' permitting the rotation of said battery of cams.

16. In a printing telegraph receiver, a plurality of character selectingmembers, a

' plurality of auxiliary selecting members` means for selecting bothgroups of said members comprising a plurality of plates having aperturestherein, spherical members fitted in said apertures for mechanicallylocking said plates, means conti'olled by line current impulses forpositioning said plates to align predetermined ones of said sphericalmembers, and all mechanical means oper-l ated due to the alignment ofsaid spherical members for positioning one of said auxiliary selectingmembers for operation.

17. In a printing telegraph receiver, a plurality of auxiliary selectingmembers, means for selecting said members comprising a plurality of`plates having apertures therein, spherical members fitted in saidapertures for mechanically locking said plates, means controlled by linecurrent impulses for positioning said plates to align predetermined onesof said spherical members, all mechanical means operated due to thealignment of said spherical members for positioning` one of saidauxiliary selecting members for operation, and means for operating theconditioned auxiliary member.

18. In a printing telegraph receiver, a type wheel and a printingmechanism, means for advancing said type wheel and printing mechanismstep by step for character spacing, means for returning said type wheeland printing mechanism to their normal position for the commencement ofa new line of printing comprising a plurality of plates having aperturestherein, spherical members fitted in said apertures, means controlled byline current impulses for positioning said plates to align predeterminedones of said spherical members, a plurality of auxiliary selectingmembers and means operated by the alignment of said spherical membersfor conditioning one of said auxiliary selecting members for operation,said type wheel and printing mechanism being restored to their normalposition following the conditioning of one of said auxiliary selectingmembers.

19. In a printing telegraph receiver, a type wheel and a printingmechanism, means for advancing said type wheel and printing mechanismstep by step for character s acing, means for returning said type W eeland printing mechanism to their normal position for the commencement ofa new line of printing comprising a plurality of plates having aperturestherein, spherical members fitted in said apertures, means controlled byline current impulses for positioning said plates to align predeterminedones of said spherical members, a plurality of auxiliary selectingmembers, means operated by the alignment of said spherical meinbers forconditioning one of said auxiliary selecting members for operation, andmeans operated following the conditioning of one of said auxiliaryselecting members for operation for operating the conditioned selectingmember to effect the restoration of said type wheel and printingmechanism to their normal position for the commencement of a new line ofprinting.

20. In a printing telegraph receiver, a movable type carrying mechanismand a stationary platen, means for rotating said platen for positioningan unprinted area of the printing medium before the type carryingmechanism comprising a plurality of plates having apertures therein,spherical members fitted in said apertures, means controlled by linecurrent impulses for positioning said plates to aligned predeterminedones of said spherical members, and means operated by the alignment ofsaid spherical members for conditioning one of said auxiliary selectingmembers for operation, said platen being rotated for positioning anunpiinted area of the printing medium before the type carryingVmechanism following the conditioning of said auxiliary selecting memberfor operation.

21. In a printing telegraph receiver, a movable type carrying mechanismand al stationary platen, means for rotating said platen for positioningan unprinted area of the printing medium before the type carryingmechanism comprising a plurality of plates having 'apertures therein,spherical members fitted in said apertures, means controlled by linecurrent impulses for positioning said plates to align predetermined onesof said spherical members, means operated iccn by the alignment of saidspherical members f having apertures therein, spherical members fittedin said apertures, means controlled by line current impulses forpositioning said vplates to align predetermined ones oi' said s hericalmembers, means operated by the alignment of said spherical members forconditioning one ot' said auxiliary selecting members for operation, apawl and ratchet mechanism associated with-said platen, and

' means for operating the vconditioned auxiliary selecting member tocause the operation of saidpawl for advancing said ratchet wheel. i

28. In a printing telegraph receiver, a

' typewheel having two rows of characters arranged thereon, means t'orshitting said type wheel to'bring either of said rows of characters intoa printing position comprising a plurality of plates having aperturesthereiary selecting member for altering the position of said type wheelto bringvthe other row of characters into a printing position.

24. In a printing telegraph receiver, a type wheel having two rows ofcharacters arranged thereon, means for shifting said type wheel to bringeither vof said rows of characters into a printing position comprising aplurality of plates having apertures therein, an auxiliary selectingmember individual to each of said plates, spherical members iitted inthe apertures of said plates,A

means controlled by line current impulses for positioning said plates toalign predetermined ones of said spherical members, means operated bythe alignment of said spherical members for conditioning one of saidauxiliary selecting members for operation, Vmeans for operating theconditioned auxiliary lselecting member for altering the Y positioningof said type wheel to bring the other row` 'of characters into aprinting position, Vand means controlled by another of said auxiliaryselecting members for effecting the movement of said type wheel to itsnormal position.

25. In a printing telegraph receiver operative on the start-stopprinciple, a plurality of revolvable and horizontally movable selectingelements, escapement means associated with said selecting elements tocontrol their rate of rotation, and means responsive to a startingimpulse `for releasing said controlling means and responsive tocharacter selecting impulses for determining the position taken by saidselecting elements upon their rotation.

26. In a telegraph receiver, `recording mechanism comprising a recordingmember having thereon a group of designations to be recorded, atranslating mechanism comprising a group of movable members, a seriesoi' -movable elements mounted ineach ofi movable members for lockingsaid membeis together means controlled by the alignment of differentcombinations of movable elcments to select the designation to berecorded according to the setting of said movable members.

27. In a printing telegraph receiver, a member carrying a plurality ofrecording designations, a translating mechanism, comprising a pluralityof movable members, each having a plurality of apertures, memberspositioned in each of said apertures for locking said members together,means to move said movable members to have varying relations to oneanother, means controlled by the members in said apertures to select oneof said recording designations according to the position of said movablemembers, and means to record the selected recording designation.

28. In a printing telegraph receiver, a type wheel, a combinationdevice, auxiliary function mechanism, operating links individual to eachfunction, means to control the printing position of the type wheel bythe setting of the combination device, and means to control theselection of the auxiliary function links directly by the samecombination mechanism.

In Vwitness whereof, I hereunto subscribe my name this 28th day ofDecember A. D., 1922.

LOUIS M. POTTS.

